Application of hyperspectral remote sensing data-based anomaly extraction in copper-gold prospecting in the Solake area in the Altyn metallogenic belt, Xinjiang
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摘要: 利用CASI/SASI机载高光谱遥感数据,对新疆阿尔金成矿带索拉克一带的蚀变矿物异常信息进行提取和分析,在此基础上总结区内蚀变矿物异常的分布规律及成因,结合典型岩石、矿物的地面光谱测量对不同地质体蚀变矿物的光谱曲线特征进行分析和总结,并选取索拉克铜金矿床的矿化蚀变地质剖面开展光谱测量分析,构建该区标志性蚀变矿物组合,建立了基于区内金矿床的高光谱遥感找矿模型。综合成矿地质背景及地球化学异常特征,探索高光谱异常在成矿预测中的应用,验证表明圈定的高光谱异常区域金矿化较好,说明高光谱遥感能为找矿提供准确且可靠的信息。Abstract: This study extracted and analyzed the altered mineral anomalies in the Suolake area in the Altyn metallogenic belt, Xinjiang using the airborne hyperspectral remote sensing data (CASI/SASI). Based on this, the distribution pattern and genesis of the altered mineral anomalies in the area were summarized. Then, the spectral curve characteristics of altered minerals from different geologic bodies were analyzed and summarized according to the ground spectrum measurement of typical rocks and minerals. Meanwhile, the spectral measurement and analysis of the geologic profiles of altered minerals in the Suolake copper-gold deposit were conducted. Then, representative altered mineral assemblages were determined, and the hyperspectral remote sensing prospecting model based on gold deposits in this area was established. Base on metallogenic geological setting and geochemical anomaly characteristics, this study explored the application of hyperspectral remote sensing data-based anomaly extraction in metallogenic prediction. The results verified that the anomaly areas delineated using hyperspectral remote sensing data have favorable gold mineralization, suggesting that hyperspectral remote sensing can provide accurate and reliable information for ore prospecting.
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Key words:
- hyperspectral remote sensing /
- altered minerals /
- prospecting model /
- gold deposits /
- Altyn
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